Lucent Technologies Lineage
®
2000 50A -48V 364A-3 SR Series Rectifier
Issue 6 January 1997
Maintenance 7 - 1
7
Maintenance
Introduction
This section provides field maintenance information and
procedures for the rectifiers and their associated RSAs. Those
unfamiliar with the function of rectifier controls and indicators
should read Section 6, Operating Controls And Displays.
Fan
Maintenance
The expected life of the rectifier fan at 25° C (77° F) is seven
years. The fan is mounted external to the rectifier allowing fan
replacement without opening the rectifier. The fan is easily
replaced in the field, requiring only a screwdriver. When a fan
fails, the rectifier shuts down and issues an RFA alarm and a TA
alarm both locally and to a controller.
Two approaches can be taken to fan maintenance. The first
approach is to replace all fans on a routine basis every five years,
ensuring that the fans do not fail in the field under normal
operating conditions. This approach is appropriate for sites
without alarm facilities. The second approach, assuming one has
remote alarm capability, is to wait until the fan fails. The rectifier
will safely shut down and issue both an RFA and a TA alarm.
The fan can then be replaced. Since it is likely that all the
rectifiers in that installation are of roughly the same age, all
rectifier fans at that site should be replaced at that time. The
approach used depends on the convenience of the site as well as
the monitoring of alarms used at the site.
Performance
Testing
When load sharing is disabled, it is perfectly normal for one
rectifier to be fully loaded and another producing no current.
However, the following tests can be done to insure that all
rectifiers are capable of producing current. These tests may be